Thousands of supporters of ousted President Mohamed Morsi continued to gather in protest camps in Cairo overnight, despite threats to forcibly remove them.
On Sunday, a senior security source told Reuters troops will be deployed around the sit-ins by dawn "as a start of procedures that will eventually lead to a dispersal".
Members of the Muslim Brotherhood and supporters of deposed Egyptian President Mohamed Morsi continue to gather in Cairo despite threats of removal.
Egyptian police are expected to start taking action early today, according to security and government sources.
Egyptian police are expected to start taking action early on Monday against supporters of deposed President Mohamed Morsi who are gathered in protest camps in Cairo, security and government sources said.
Any move against the camps, which are the main flashpoints in the confrontation between the army and Morsi supporters, could trigger more bloodshed.
The head of al-Qaeda, Ayman al-Zawahiri has reportedly issued an audio message in which he accuses the United States of plotting the overthrow of Egypt's first Islamist president Mohamed Morsi.
CNN reported the 14-minute message, the apparent first to address Mr Morsi's ousting last month, was posted to Jihadist forums yesterday.
Al-Zawahiri is quoted as saying: "The crusaders, the seculars, the Americanised army, (former President Hosni) Mubarak's thugs and some members of Islamic parties with the support of Gulf money and American plotting, all agreed to topple Mohamed Morsi's government."
In a phone call with Egyptian vice president for foreign affairs, Mr Hague stressed the need for dialogue and reconciliation between all political parties including Mr Morsi's Muslim Brotherhood.
The Foreign Secretary also condemned the excessive use of force by security services as well as attacks against them.
Mr Hague said: "We want to see a peaceful resolution that will bring an urgent end to the current bloodshed. In my view, this should involve a process of dialogue and reconciliation between all political parties in Egypt, including the Muslim Brotherhood.
"I also called for the release of all political detainees, including President Morsi, unless there are criminal charges to be made against them, and emphasised that it is vital that any charges are not politically motivated."
The European Union's foreign policy chief Baroness Ashton has said deposed Egyptian President Mohamed Mursi was "well" and had access to television and newspapers when she visited him.
She spoke to journalists after meeting Mr Mursi at an undisclosed location last night.
European Union foreign policy chief Cathy Ashton has met ousted Egyptian president Mohamed Morsi and held two hours of "in depth" discussions with him, her spokeswoman, Maja Kocijancic, said.
Supporters of Egypt's ousted president Mohammed Morsi marched towards security headquarters in Cairo on Monday night, raising fears of new clashes as the EU's foreign policy chief met local officials, according to the Agence France Presse agency.
The marches came despite a warning from the National Defence Council late Sunday that it would take "decisive and firm action" against demonstrators if they went beyond their right to peaceful protest.
The Egyptian authorities have ordered that deposed president Mohamed Morsi be detained for 15 days over an accusation he conspired with Hamas in a series of prison breaks in Egypt in 2011, Reuters have reported.
Seven people were killed and 261 wounded in Cairo when supporters of Mohamed Morsi clashed with the deposed president's opponents and security forces overnight, the head of Egypt's emergency services said.
Mohamed Sultan told Reuters two people had been killed at a bridge in central Cairo and five more in the capital's Giza district.